# 求两点距离
def cal_point_distance(point1,point2,z_distance):
    # point1 = [x1,y1]
    # point2 = [x2,y2]
    [x1,y1] = point1
    [x2,y2] = point2
    return pow(pow(x2-x1,2)+pow(y2-y1,2)+pow(z_distance,2),0.5)

# 求多个预测结节与该金标准结节最大层面中心点距离,返回一个最小中心距离的index
def find_min_distance():
    return 0